Erik Erikson was an ego psychologist that patterned his theories after Freud. Erikson strongly felt that culture and society have an effect on the ego and that a struggle or conflict can begin. Erik Erikson designed a model of development that has 5 stages of psychosocial development that extend through childhood.
Observation one: Vygostsky's Sociocultural Theory. Vygostsky's sociocultural theory describes how cognitive development proceeds as a result of social interactions between members of a culture. This particulary emphasizes the fact that children develop cognitively in their understanding of the world, what is important in society through play and cooperation with others. This is shown in the two children playing.
"Diamond argues that both geography and the environment played major roles in determining the shape of the modern world. This argument runs counter to the usual theories that cite biology as the crucial factor. Diamond claims that the cultures that were first able to domesticate plants and animals were then able to develop writing skills, as well as make advances in the creation of government, technology, weaponry, and immunity to disease." Fascinating and thought-provoking!